Added git workflow and shell script for fuzzing

fuzzing_setup.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+# Copyright 2019 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Ensure the script doesn't fail on Github workflows
+export TERM=${TERM:-vt100}
+done_text="$(tput bold)DONE.$(tput sgr0)"
+
+set -e
+
+# Install cargo-fuzz library.
+cargo install cargo-fuzz